I. INTROEDUCTION The CR wireless network is intended as an advanced technology integration environment with a motivation on making adaptive, spectrum efficient systems with emerging programmable radios.Wireless communication phenomena are mainly due to scattering of electromagnetic waves from surfaces or diffraction over and around buildings[1]. The communication channels are required to design...

    Over the past few decades, the family affected by the processes, and consequences of modernization has experienced profound changes in both objective-structural and semantic-subjective levels. The family has faced new issues, some of which represent progress and welfare, and some suggest traumatic social issues which reduce the pace of development in the society as hindering factors. Thus, ...

The Nakagami distribution has gained widespread application in the modeling of wireless fading channels. The primary justification for the use of the Nakagami distribution is its good fit to measured fading data. This distribution can model signal fading conditions that range from severe to moderate, to light or no fading. Despite the fact that Nakagami fading is widely used in theoretical anal...

This article presents an ultra-compact and highthroughput reconfigurable architecture for implementing an efficient fading channel simulator that supports a relatively large number of propagation paths. To closely reflect actual radio signal propagation conditions, we used a recently improved Rayleigh and Ricean fading channel model based on the sumof-sinusoids technique. The improved model is ...

This paper presents a geometric analysis of the convergence condition for the Foschini-Miljanic power control algorithm with and without fading. In the fading case, a condition on the Lyapunov exponent is provided as the convergence condition. The Möbius transform is exploited for the first time to analyze the convergence conditions for both non-fading and fading cases. For the two-transmitter ...

In this paper we examine the robustness of two element transmit beamforming in the presence of feedback delay and quantization error. Specifically, we examine the robustness of two-element beamforming techniques in the presence of Ricean fading. We show that when the fading is Ricean, feedback methods are significantly more robust than when the fading is Rayleigh. This is significant since many...

ETRI Journal, Volume 26, Number 6, December 2004 In this paper, we discuss the design problem and the robustness of space-frequency trellis codes (SFTCs) for multiple input multiple output, orthogonal frequency division multiplexing (MIMO-OFDM) systems. We find that the channel constructed by the consecutive subcarriers of an OFDM block is a correlated fading channel with the regular correlatio...

Recently, a Bayesian receiver for blind detection in fading channels has been proposed by Chen, Wang and Liu (2000, IEEE Trans. Inform. Theory , 46, 2079–2094), based on the sequential Monte Carlo methodology. That work is built on a parametric modelling of the fading process in the form of a state-space model, and assumes the knowledge of the second-order statistics of the fading channel. In t...